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Stable Huawei micro certification, stable Huawei cloud database service practice
2022-07-06 04:06:00 【Magic moon Xiaokai】
Huawei cloud database service practice
List of articles
The key RDS The service is introduced
RDS Overview of cloud services and key technologies
Self test questions
DRS: Data replication services
DDM: Distributed database middleware
OBS: Object storage service
Common test questions
DDM
Distributed database middleware (Distributed Database Middleware, abbreviation DDM), Is a Distributed relational database middleware . compatible MySQL agreement , Focus on solving the problem of distributed database expansion , Break through the capacity and performance bottlenecks of traditional databases , High concurrent access to massive data .
DRS
Data replication services (Data Replication Service, abbreviation DRS) It's easy to use 、 Stable 、 Efficient 、 Cloud services for real-time database migration and real-time database synchronization .
Live migration
Real time migration refers to when the data replication server can connect the source database and the target database at the same time , You only need to configure the migration source 、 The target database instance and migration object can complete the whole data migration process , Then through the comparative analysis of multiple indicators and data , Help determine the right time to cut business , Realize database migration that minimizes business interruption .
Backup migration
For safety reasons , Database IP Sometimes the address cannot be exposed on the public network , But select dedicated network for database migration , The cost is high . In this case , You can choose the backup migration provided by the data replication service , By exporting the data of the source database into a backup file , And upload to the object storage service , Then restore to the target database . Backup migration can help you when the cloud service does not touch the source database , Realize data migration .
Real time synchronization
Real time synchronization is between different systems , Copy data from one data source to another database through synchronization technology , And be consistent , Realize real-time data flow of key business .
Data subscription
Data subscription refers to obtaining data change information of key businesses in the database , Such information is often needed by downstream businesses . Data subscription caches it and provides a unified SDK Interface , Facilitate downstream business subscription 、 obtain 、 Co consumption , So as to realize the decoupling between the database and the downstream system , Business process decoupling .
Common scenarios :kafka subscribe MySQL Incremental data .
Real time disaster recovery
In order to solve the service unavailability caused by regional failure , Data replication service launches disaster recovery scenario , Provide database synchronization guarantee for user business continuity . You can easily realize disaster recovery from off cloud database to on cloud 、 Database disaster recovery across cloud platforms , No need to invest huge amounts of infrastructure in advance .
Data disaster recovery supports two places and three centers 、 Disaster recovery architecture of two places and four centers . Unilateral disaster recovery can take advantage of the promotion of disaster recovery scenarios 、 The backup reduction function can realize the effect of remote active and standby switching .
Supported database engine
Live migration
- MySQL
- MongoDB
- DDS
- MySQL Sub database and sub table
Backup migration
- Migration from a higher version to a lower version is not supported .
- Microsoft SQL
Real time synchronization
- MySQL
- PostgreSQL
- DDM
- Oracle
- GaussDB(for openGauss) Distributed version
- GaussDB(for openGauss) Master and backup
- DDS
- DB2
Data subscription
RDS for MySQL
5.6、5.7 edition
Disaster preparedness in time of disaster
- MySQL
- DDM
- GaussDB(for MySQL) Master and backup
DAS
Data management services (Data Admin Service, abbreviation DAS), Used to login and operate cloud databases Web service , Provide database development 、 Operation and maintenance 、 Intelligent diagnosis 、 Enterprise class DevOPS One stop cloud database management platform , It is convenient for users to use and operate Huawei cloud database .
GaussDB
GaussDB(for openGauss) It is a self-developed product made by Huawei Enterprise class distributed Relational database , This product has the ability of enterprise level complex transaction mixed load , At the same time, it supports excellent distributed transactions , Across the city AZ Deploy , data 0 The loss of , Support 1000+ Expand capabilities ,PB Enterprise class database features such as mass storage . Own the cloud High availability , Highly reliable , High security *, Stretch and stretch , One key deployment , Fast backup recovery , Monitoring, warning and other key capabilities , It can provide comprehensive functions for enterprises , Stable and reliable , Extensibility is strong , Enterprise database service with superior performance .
Application scenarios
Transactional applications
Big concurrent 、 Large amount of data 、 Transaction oriented application based on online transaction processing , Such as government affairs 、 Finance 、 Online retailers 、O2O、 telecom CRM/ Billing, etc , Service capability supports high expansion 、 Elastic expansion and contraction , Applications can choose different deployment scales as required .
Detailed list inquiry
Have PB Level data load capacity , Through memory analysis technology to meet the requirements of massive data storage and query , For safety 、 telecom 、 Finance 、 Detailed order inquiry business in the Internet of things and other industries .
RDS
PostgreSQL Is an open source object cloud database management system , And focus on scalability and standards compliance , Known by the industry as “ The most advanced open source database ”.
- Support postgis plug-in unit , Excellent space applications , Meet international standards . Reduce O Migration complexity 100%
- Low cost
- Create using
- The elastic expansion
- Fully compatible with
- Convenient operation and maintenance
- High performance
- performance optimization
- High quality hardware foundation
- SQL Optimization plan
- High speed access
- High security
- Network isolation
- Access control
- Transmission encryption
- Storage encryption
- Data deletion
- prevent DDOS attack
- Safety protection
- high reliability
- hot standby
- The data backup
- Data recovery
Rights management
Policy name / System roles | describe | Category | Dependency relationship |
---|---|---|---|
RDS FullAccess | All permissions of relational database service . | System strategy | nothing . |
RDS ReadOnlyAccess | Read only permission of relational database service resources . | System strategy | nothing . |
RDS ManageAccess | Relational database services except delete DBA jurisdiction . | System strategy | nothing . |
RDS Administrator | Relational database service administrator . | System roles | rely on Tenant Guest and Server Administrator role , Check the dependent role in the same project . |
The relationship between common operations and system permissions
operation | RDS FullAccess | RDS ReadOnlyAccess | RDS ManageAccess | RDS Administrator |
---|---|---|---|---|
establish RDS example | √ | x | √ | √ |
Delete RDS example | √ | x | x | √ |
Inquire about RDS The instance list | √ | √ | √ | √ |
Billing instructions
Billing items | Billing instructions |
---|---|
Database instance | There are two ways of monthly package and on-demand billing . The instance specification billing method under the same instance is consistent with the storage billing method . |
Database storage | |
Backup storage ( Optional ) | RDS Some free storage space is provided , For storing your backup data , Its total capacity is about... Of your purchase capacity 100%. The amount of backup storage exceeds the storage space of the database 100%, Start charging according to the ladder . |
Public network traffic | RDS The instance supports public network access , Public network access will generate bandwidth traffic charges ;RDS The traffic generated by the database instance on the cloud internal network is not charged . |
Billing mode
Provide by hour 、 monthly 、 The annual billing method is flexible for you to choose , The longer you use it, the cheaper it will be .
Prepayment ( Every year, every month ): This purchase method offers a larger discount than pay as you need , For long-term users , Recommend this method .
Pay as you go ( Hours ): This purchase method is more flexible , You can start and stop immediately , Charge according to the actual use time . It is charged in natural hours , Less than one hour is charged for one hour .
Change of billing method : Support the conversion of package cycle and on-demand billing .
If you need to change the billing method , Please refer to On demand instance subcontracting cycle and Packet cycle instance to on-demand Chapter to convert the billing method .
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